Some NYPD cops were mistakenly told that the man they had just nabbed for turnstile-jumping was a wanted murderer — and one of them was injured as he wrestled to hold onto the suspect, authorities said Monday.

The officers were on foot patrol inside the 125th Street station in Harlem when they spotted the man jumping the turnstile around 9 a.m., police said.

They then held him while they ran his name to check for any warrants, cops said.

A police dispatcher erroneously reported back that the man may be a homicide suspect, police said.

A struggle between the man and police ensued, and the suspect eventually broke free and fled, cops said.

One of the cops suffered an ankle injury during the struggle. The officer was taken to Harlem Hospital.

Cops in transit and on patrol are searching for the fare-beater, who remains at-large.